He was a well-dressed, soft-spoken man who was devoted to his large family and seemed knowledgeable about ways to repair Washington's broken down public schools. Kifah W. Jayyousi's chief problem as a D.C. school official appeared to be a reckless determination to get the job done, those who knew him said. He lasted less than two years before he was booted out, but no one suspected that the mild-mannered naturalized U.S. citizen from Jordan might be associated with terrorists. On Thursday, a federal jury in Miami convicted the former chief of facilities for D.C. public schools of conspiring to murder,...